Yeah you do get the oil smell, I have piped my catch tank breather hose to the bottom of the engine bay, this has helped since when stationary it does not really get all the way down there and then when moving the gasses should be drawn out by the pipe sticing down just lower than the splash guard. I have not bothered with a filter on it as I dont see the point.Piccies when you do Alan please!:dddc:
I assume the performance gain folks are reffering too will be something along the lines of- if you allow the catch tank to vent to air instead of simply passing back into the TB- then you'll be getting cleaner air into the engine!!!!!????
Yes/no- have i got the right end of the stick!???
All i'd say regarding that is that you have to be careful WHERE you sight vents- as i did used to have a different system for the breather setup- where it basically vented to air instead of through a catch tank & back into the engine- and you could definitely smell oil/engine vapours coming into the car at times when it was like that!!!!!!!!!
All i can say regarding my catch tank setup is that since fitting n modfying it- i no longer see any liquid oil gathering in the TB- it's free n clear- which should hopefully mean the VIS motors are nice n clean too (seen pics of some that were gunked up to hell n that surely can't be good for em!)
The power is gained by cooler, cleaner air entering the engine, oil vapur reduces octane which even if the engine is not mapped aggesivly for will reduce the burn in the cylinder and make it burn out quicker.